The answer is underlying storage corruption because the log entries explicitly reference table corruption and page corruption, which are classic indicators of physical storage layer failures rather than logical database issues. In Amazon Aurora MySQL, the storage layer is distributed and self-healing, but when corruption manifests at the page level, it typically points to a rare but critical hardware or storage subsystem fault that Aurora’s automated repair mechanisms cannot resolve. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your ability to distinguish storage corruption from common red herrings like connection errors, backup restore artifacts, or replication lag—each of which produces distinct error patterns. A common trap is assuming Aurora’s managed storage is immune to corruption, but the exam emphasizes that while Aurora reduces risk, it does not eliminate it entirely. Memory tip: think “page = physical” — if you see page corruption in logs, always suspect the storage layer first.
DBS-C01 Monitoring and Troubleshooting Practice Question
This DBS-C01 practice question tests your understanding of monitoring and troubleshooting. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Exhibit
Refer to the exhibit.
```
# CloudWatch Logs log group: /aws/rds/cluster/mycluster/error
# Log stream: production-2024-05-01
2024-05-01T10:00:00Z [ERROR] [MY-000001] [Server] Table 'mydb.temp_data' is marked as crashed and should be repaired
2024-05-01T10:01:00Z [ERROR] [MY-000002] [InnoDB] Database page corruption on disk or a failed file read of page
```
Refer to the exhibit. A DBA sees the above log entries for an Amazon Aurora MySQL cluster. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Refer to the exhibit.
```
# CloudWatch Logs log group: /aws/rds/cluster/mycluster/error
# Log stream: production-2024-05-01
2024-05-01T10:00:00Z [ERROR] [MY-000001] [Server] Table 'mydb.temp_data' is marked as crashed and should be repaired
2024-05-01T10:01:00Z [ERROR] [MY-000002] [InnoDB] Database page corruption on disk or a failed file read of page
```
A
There is underlying storage corruption
Page corruption errors indicate storage issues.
B
The reader instance is lagging behind the writer
Why wrong: Replication lag does not cause corruption.
C
The DB instance has run out of connections
Why wrong: Errors indicate corruption, not connection limits.
D
A recent backup restore operation failed
Why wrong: Backup restore would not cause corruption.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
There is underlying storage corruption
Option D is correct because the logs indicate table corruption and page corruption, typically due to underlying storage issues. Option A is wrong because connection issues would show different errors. Option B is wrong because backup restore would not cause corruption. Option C is wrong because replication lag shows different symptoms.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
There is underlying storage corruption
Why this is correct
Page corruption errors indicate storage issues.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Errors indicate corruption, not connection limits.
✗
A recent backup restore operation failed
Why it's wrong here
Backup restore would not cause corruption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Monitoring and Troubleshooting — This question tests Monitoring and Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: There is underlying storage corruption — Option D is correct because the logs indicate table corruption and page corruption, typically due to underlying storage issues. Option A is wrong because connection issues would show different errors. Option B is wrong because backup restore would not cause corruption. Option C is wrong because replication lag shows different symptoms.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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